Next Article in Journal
The Structural, Photocatalytic Property Characterization and Enhanced Photocatalytic Activities of Novel Photocatalysts Bi2GaSbO7 and Bi2InSbO7 during Visible Light Irradiation
Next Article in Special Issue
Modelling of Granular Fracture in Polycrystalline Materials Using Ordinary State-Based Peridynamics
Previous Article in Journal
Improvement in Fatigue Performance of Aluminium Alloy Welded Joints by Laser Shock Peening in a Dynamic Strain Aging Temperature Regime
Previous Article in Special Issue
Study on Stress Development in the Phase Transition Layer of Thermal Barrier Coatings
Open AccessArticle

Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study

by Hui Zhang 1 and Rena C. Yu 2,*
College of Civil Engineering & Architecture, Zhejiang University, Hangzhou 310058, China
ETSI de Caminos, C. y P., University of Castilla-La Mancha, Ciudad Real 13071, Spain
Author to whom correspondence should be addressed.
Academic Editors: Timon Rabczuk and Pattabhi Budarapu
Materials 2016, 9(10), 800;
Received: 30 August 2016 / Revised: 19 September 2016 / Accepted: 20 September 2016 / Published: 26 September 2016
(This article belongs to the Special Issue Multiscale Methods and Application to Computational Materials Design)
It is well known that fibers improve the performance of cementitious composites by acting as bridging ligaments in cracks. Such bridging behavior is often studied through fiber pullout tests. The relation between the pullout force vs. slip end displacement is characteristic of the fiber-matrix interface. However, such a relation varies significantly with the fiber inclination angle. In the current work, we establish a numerical model to simulate the entire pullout process by explicitly representing the fiber, matrix and the interface for arbitrary fiber orientations. Cohesive elements endorsed with mixed-mode fracture capacities are implemented to represent the bond-slip behavior at the interface. Contact elements with Coulomb’s friction are placed at the interface to simulate frictional contact. The bond-slip behavior is first calibrated through pull-out curves for fibers aligned with the loading direction, then validated against experimental results for steel fibers oriented at 30 and 60 . Parametric studies are then performed to explore the influences of both material properties (fiber yield strength, matrix tensile strength, interfacial bond) and geometric factors (fiber diameter, embedment length and inclination angle) on the overall pullout behavior, in particular on the maximum pullout load. The proposed methodology provides the necessary pull-out curves for a fiber oriented at a given angle for multi-scale models to study fracture in fiber-reinforced cementitious materials. The novelty lies in its capacity to capture the entire pullout process for a fiber with an arbitrary inclination angle. View Full-Text
Keywords: fiber-reinforced concrete; pullout response; internal friction resistance fiber-reinforced concrete; pullout response; internal friction resistance
Show Figures

Figure 1

MDPI and ACS Style

Zhang, H.; Yu, R.C. Inclined Fiber Pullout from a Cementitious Matrix: A Numerical Study. Materials 2016, 9, 800.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop